2181750 Self-Aligning Plain Bearing

Comprehensive specifications and application details for: 2181750 Self-Aligning Plain Bearing.

Summary

Explore detailed summary information for bearing: 2181750. Includes NSN, classification group, and identification codes to support sourcing, compliance, and accurate part tracking.

Part Number: 2181750
Federal Supply Classification: 3120 Unmounted Plain Bearings
(NSN) National Stock Number: 3120-00-903-9979
Item Name Code: 13208
Federal Item Identification Guide: A045A0
Assigment Date: 06/15/1966

A detachable assembly in or on which a journal, gudgeon, pivot, or the like moves. It is used to carry a load and to reduce sliding friction. It does not employ rolling elements. The item consists of a bored precision ground ball (or spherical plain bearing) around which an outer ring is fitted. The assembly may be either separable or nonseparable. Excludes:bearing, plain, rod end and bearing, plain, spherical.

0.4950 inches minimum and 0.5000 inches maximum inner member width, 0.2500 inches minimum and 0.2505 inches maximum bore diameter, 50.0 rockwell c nominal overall hardness rating, steel corrosion resisting overall material, 0.7769 inches minimum and 0.7774 inches maximum outer member outside diameter

Datasheet

Below are the comprehensive technical specifications for bearing: 3120-00-903-9979 . Find dimensions, materials, tolerances, performance characteristics, etc.

Bore Diameter: 0.2500 inches minimum and 0.2505 inches maximum
Hardness Rating: 50.0 rockwell c nominal overall
Inner Member Width: 0.4950 inches minimum and 0.5000 inches maximum
Material: steel corrosion resisting overall
Outer Member Outside Diameter: 0.7769 inches minimum and 0.7774 inches maximum
Outer Member Width: 0.3870 inches minimum and 0.3920 inches maximum
Style Designator: without insert or liner
Surface Treatment: chromium inner member

Replaces

The NSN 3120-00-903-9979 is used in place of the following discontinued or alternate items:

NSN	Name	Date
3120-01-137-5750	No Name Available	08/01/1984

Frequently Asked Questions

Find quick answers to common questions about bearing: 2181750. Explore technical specifications, installation tips, maintenance guidelines, regulatory requirements, and troubleshooting advice.

What is the FSCG of the NSN 3120-00-903-9979?: The FSCG of the NSN 3120-00-903-9979 is 3120

Does the NSN 3120-00-903-9979 have a Schedule B code assigned?: Yes, the Schedule B code is 8482300040

Does NSN 3120-00-903-9979 require demilitarization?: Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 3120-00-903-9979 contain precious materials?: Precious metal content is unknown

Does NSN 3120-00-903-9979 contain hazardous materials?: Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.